newcomb



Nu. 6I3,466. PatenfedNov. 1, I898. c. L. NEWGOMB.

VERTICAL MB PUMP FOR MOIST AIR OR GASES.

. (Application filed Aug. 8, 1895.) (No Model.) 2 Sheets-Shet l.

Patented Nov. I, I898.

.Na. 6I3,466.

C. L. NEWCUMB. VERTICAL AIR PUMP FOR MOIST AIR 0R-GASES.

(Application filed Aug. 3, 1895.)

2 Sheets-Sheet 2.

(No Modeli) "m: scams PETERS co. Moro-urns" wnsmncrou, n. c

UNITED STATES PATENT OFFICE.

CHARLES L. NEWOOMB, OF HOLYOKE, MASSACHUSETTS, ASSIGNOR TO THE DEANE STEAM PUMP COMPANY, OF SAME PLACE.

V ERTlCAL AlR-PUMP FOR MOIST AIR OR GASES.

srncrrrcA'rron forming part of Letters Patent No. 613,466,dated November 1, 1898.

Application filed August 3, 1895.

To all whom it may concern.-

Be it known that I, CHARLES L. NEWooMB, a citizen of the United States, residing at Holyoke, in the county of Hampden and State of Massachusetts, have invented a new and useful Improvement in Vertical Air-Pumps for Moist Air or Gases, of which the following is a specification, accompanied by drawings, forming a part of the same, in which Figure 1 represents a perspective view of an air-pump embodying my invention. Fig. 2 is a front elevation of the supporting-framework of one of the pump-cylinders, with the pump-cylinder shown in centraLvertical sectional View; and Fig. 3 is a top view of the cylinder.

Similar letters refer to similar parts in the different figures.

My invention relates tothat class of airpumps for pumping air or gases which are more or less charged with moisture; and it consists in certain features of construction and arrangements of parts, as hereinafter described, and set forth in the annexed claims.

Referring to the drawings, Fig. 1 represents an air-pump having two pumping-cylinders operated from a single driving-shaft, and as the two pumping-cylinders are duplicates I have confined my description to one of the cylinders, which I have shown in sectional view in Fig. 2'.

A denotes the base or bed plate, supporting a columnar framework B B, upon which are mounted the pumping-cylinders O O, inclosing pistons carried upon pistonrods connected with reciprocating cross-heads D D, driven in the usual manner from a shaft E, rotated through a belt-pulley E.

Referring to Fig. 2., F denotes a reciprocating piston, and F its piston-rod.

An air-chest G, Fig. 3, is formed upon the side of the cylinder,communicating, bymeans of a pipe G, with a tank or receptacle from which the air or gas is to be exhausted. The air-chest G communicates with the interior of the pump-cylinder O by means of a passage G Fig. 2, holes G G and air-passages G and G the hole G and air-passage G and the hole G and air-passage G6 being alternately brought into communication by means of a reciprocating valve H, the sliding Serial No. 558,117. (No model.)

movement of the valve H also alternately opening the passages G and G to an exhaustchamber I, which is inclosed within the shell J. The shell J is open at the top, as at J, allowing the contents of the cylinder to be exhausted at each reciprocating movement of the piston through the passages G and G and chamber I into the open air. The lower end J 2 is closed, and the shell is provided with a flange J 3 at its sides and lower end, which is attached by bolts J 4 to the side of the. cylinder. The Valve H is carried upon a reciprocating stem H, which passes through a hole in the bottom of the shell J and is surrounded upon the inner side of the shell by a coneshaped boss J which carries the drip from the center into the annular trough J The cylinder 0 has its lower head K integral with the sides of the cylinder and with its central section raised or dome-shaped, as at K, and provided with a central opening concentric with the piston-rod F, forming an annular recess K which communicates at the bottom with the cylinder-chamber by means of a passage K having a slight inclination, sufficient to allow the products of condensation which may be caughtin the chamber K to fiow into the cylinder-chamber. The cham ber K is closed at the bottom by the stuffing box K attached by its flanges K The piston F is raised or dome-shaped in its central section, as at F, and the upper head K is correspondingly raised in its central section, as at K", to permit the upward movement of the piston to the end of the cylinder and is removably attached to the cylinder by bolts K During the operation of the pump the condensed liquid which collects upon the upper surface of the piston is held upon the lower annular section K from which it flows at each upward stroke of the piston through a drippipe L and also through the passage G into the chamber I. The condensation collected upon the lower head K is gathered at the lower annular trou gh-shaped section K ,from which it is conducted by a drip-pipe L and the condensation collected in the trough J 6 in the bottom of theshell J is removed through a drip-pipe L.

What I claim as my invention ,and desire to secure by Letters Patent, is-

1. In an air-pump comprising a vertical cylinder having a lower cylinder-head, a piston inclosed in said cylinder and a piston-rod passing through said lower head, said lower cylinder-head being provided with a raised central portion forming an annular trough-shaped section between said raised portion and the side of the cylinder and having a central recess concentric with the piston-rod and a passage between said central recess and said trough-shaped section, substantially as described.

2. In an air-pump, the combination with a vertical cylinder, of a reciprocating piston within said cylinder having its central section curved upwardly, whereby the condensation upon said piston is collected at the edges thereof, said cylinder having an exhaust-passage at its upper end, whereby the condensation is carried out of the cylinder at each upward movement of the piston, substantially as described.

3. In an air-pump the combination with a vertical cylinder having its sides and lower head integral, said lower head having its central section raised and extendinginto said cylinder, a removable upper head having its central section raised and extending without said cylinder, a reciprocating piston within said cylinder having its central section curved upwardly to correspond with the raised section of said lower cylinder-head, whereby the condensation above said piston is collected at the edges thereof, said cylinder having an exhaust-passage at its upper end, whereby the condensation is carried out of the cylinder at each upward movement of said piston, substantially as described.

Dated this 30th day of July, 1895.

CHARLES L. NE \VCOMB.

Witnesses:

D. O. J UDD, FRANK J. PHELPs. 

